See this discussion. Once you have gone through that, the images below might give you an idea:
void trans something 0 0 7 0.95 0.95 0.95 0 0 0.947 0.333
void trans something 0 0 7 0.95 0.95 0.95 0 0 0.947 0.444
void trans something 0 0 7 0.95 0.95 0.95 0 0 0.947 0.556
Regards,
Sarith